System and method for reducing drivetrain coupling torques after a grid event

A power generating asset connected to an electrical grid, the power generating asset comprising:

• a generator;
• a power converter coupled to the generator;
• and
• a controller comprising at least one processor configured to perform a plurality of operations, the plurality of operations comprising:
• receiving a grid power limit associated with a grid event occurring in the electrical grid;
• based on the grid power limit, determining a target grid power for the generator during recovery from the grid event;
• during the grid event, implementing a first power softening function, the first power softening function comprising:
• receiving at least one of a torsional angle signal or change in speed signal associated with the drivetrain;
• upon at least one of the torsional angle or change in speed crossing a threshold value, decreasing a power command on the generator below the target grid power to reduce the torsional angle at a later point in time;
• determining a power difference between the target grid power and the decreased power command of the generator;
• and
• supplying power from an energy storage device in communication with the converter to make up the power difference.